Hi.. Chest pain
and presence of blood in the sputum are symptoms of lower respiratory infection. Its hard to guess the exact nature of the infection, severity or the extent of infections from this far without a physical examination. You will need to see a chest physician for physical examination. You will also need few blood test
and a chest xray. I would suggest you to get these done as soon as possible. If you are on aspirin
or any anticoagulant
medications, you may have to avoid those. Report back with the reports and the chest physicians opinion.